Re: [TCML] Machining Question - Techniques for Cut-Off Sawing

[Finn Hammer <f-h@xxxx>]

Dan,

A band saw is the best, a reciprocating power jig saw the next choice.

YMMV, but where I come from, it is usual practice to cut the raw blocks 
2mm or 80thou bigger than the finished object.

First you machine one face, next, you clamp this face against the fixed 
jaw of the vice, and machine another face.
To make sure that the machined face is orientated against the fixed jaw, 
you should press against it with one single point, instead of the whole 
moving jaw. A small block of phenolic, placed btwn. the moving jaw and 
the workpiece, is a good choice.

You now have 2 faces that are square to each other.

Clamping one of these faces against the fixed jaw (with phenolic between 
the moving jaw and the workpiece), and aligning the other machined face 
to be vertical, with a machinists angle, you machine the 3rd face.

After this you have 3 faces each perpendicular, and these faces can 
serve as reference to the milling operation that brings the block to 
it`s desired dimension.

On properly finished parts, all faces are machined.

Hope this helps.

Cheers, Finn Hammer


Mccauley, Daniel H skrev:
>  
> Just getting around to finally investing in a vertical mill, and am
> looking at what options there are for a cut-off saw.
> Do you typically just make a rough cut and then use the mill to
> "perfect" the cut, or get the best possible cut right off the bat
> using a cut-off saw?
>
> Dewalt and Milwaukee (as well as others) sell some inexpensive metal
> chop-saws, but not sure how well they work for soft metals like
> aluminum, brass, etc... and plastics.
>
> Any help appreciated!
> Thanks!
> _______________________________________________
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